New here... 2014 TD Cruze

New to forum looking for answers to recall issues on nox sensors. After dealer changed recalled sensor i've had nothing but issues regarding the check engine light. Had to take the vehicle in 5X and it keeps lighting up the day after I get it back. In the last month i've had my vehicle about 6 days, the rest of the time the dealer has had it. Thankfully theyve supplied me with a loaner but I prefer my vehicle (mostly because it gets better mileage and has a bigger tank than the Malibu's they've supplied, and IMO more power).